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/**
 * \file
 *
 * Implementation of draw font on LCD.
 *
 */

/*----------------------------------------------------------------------------
 *        Headers
 *----------------------------------------------------------------------------*/

#include "board.h"

#include <stdint.h>
#include <assert.h>

/*----------------------------------------------------------------------------
 *        Local variables
 *----------------------------------------------------------------------------*/

/** Global variable describing the font being instantiated. */
const Font gFont = {10, 14};

/*----------------------------------------------------------------------------
 *        Exported functions
 *----------------------------------------------------------------------------*/

/**
 * \brief Draws an ASCII character on LCD.
 *
 * \param pCanvasBuffer Pointer to dedicate canvas buffer.
 * \param x  X-coordinate of character upper-left corner.
 * \param y  Y-coordinate of character upper-left corner.
 * \param c  Character to output.
 * \param color  Character color.
 */
extern void LCDD_DrawChar(uint16_t *pCanvasBuffer, uint32_t x, uint32_t y,
						  uint8_t c, uint32_t color)
{
	uint32_t row, col;

	assert((c >= 0x20) && (c <= 0x7F));

	for (col = 0; col < 10; col++) {
		for (row = 0; row < 8; row++) {
			if ((pCharset10x14[((c - 0x20) * 20) + col * 2] >> (7 - row)) & 0x1)
				LCDD_DrawPixel(pCanvasBuffer, x + col, y + row, color);
		}

		for (row = 0; row < 6; row++) {
			if ((pCharset10x14[((c - 0x20) * 20) + col * 2 + 1]
				 >> (7 - row)) & 0x1)
				LCDD_DrawPixel(pCanvasBuffer, x + col, y + row + 8, color);
		}
	}
}

/**
 * \brief Draws a string inside a LCD buffer, at the given coordinates.
 * Line breaks will be honoured.
 *
 * \param pCanvasBuffer Pointer to dedicate canvas buffer.
 * \param dwX      X-coordinate of string top-left corner.
 * \param dwY      Y-coordinate of string top-left corner.
 * \param pString  String to display.
 */
extern void LCD_DrawString(uint16_t *pCanvasBuffer, uint32_t dwX, uint32_t dwY,
						   const uint8_t *pString, uint32_t color)
{
	uint32_t dwXorg = dwX;

	while (*pString != 0) {
		if (*pString == '\n') {
			dwY += gFont.height + 2;
			dwX = dwXorg;
		} else {
			LCDD_DrawChar(pCanvasBuffer, dwX, dwY, *pString, color);
			dwX += gFont.width + 2;
		}

		pString++;
	}
}


